My Moz prefs panel doesn't have a navigator-downloads pane, but I did insert the line into the prefs.js file. Now, though, my downloads happen invisibly -- I want a d/l manager like the one in MSIE and Opera, which shows which files are downloading and how far along they are. I guess I could just use curl...

I have been using control-click and selecting "open in new tab" for a while now, but I'd much prefer a single shortcut (i.e., option-click or command-click) that just spawns a new tab without having to scroll through a popup menu.